標題: | Multi-User MIMO Scheduling in LTE-Advanced Uplink Systems |
作者: | Hsu, Lung-Han Chao, Hsi-Lu Liu, Chia-Lung Huang, Kuei-Li 資訊工程學系 Department of Computer Science |
關鍵字: | LTE-A;clutered SC-FDMA;MU-MIMO;resource allocation |
公開日期: | 1-一月-2013 |
摘要: | Due to the facts of wireless data usage being increasing faster now than ever before and more multimedia content being generated by users and uploaded to the network, multi-user MIMO (MU-MIMO) technology would be crucial to improve the LTE-A uplink spectral efficiency for meeting the service demands. On the other side, adopting clustered SC-FDMA technology as the uplink multiple access scheme of LTE-A means that a User Equipment (UE) can be allocated more than one cluster which consists of contiguous RBs (this is the contiguity constraint). Moreover, all allocated RBs to a UE must use the same modulation and coding scheme (this is the robust rate constraint). The two constraints make MU-MIMO UL scheduling more complicated. In this paper, we formulate the MU-MIMO UL scheduling problem with taking two constraints into consideration. Since this optimization had been proven to be an NP-hard problem, we further develop two low-complexity heuristic algorithms. We demonstrate that competitive performance can be achieved in terms of system throughput and fairness index. |
URI: | http://hdl.handle.net/11536/124948 |
ISSN: | 2166-9570 |
期刊: | 2013 IEEE 24TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATIONS (PIMRC) |
起始頁: | 1811 |
結束頁: | 1816 |
顯示於類別: | 會議論文 |